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Yamaha 50HETOLYamaha Logo


 

Details

The 2-stroke models of the Midrange series are driven by our proven 3-cylinder power units with loop charging and pulse tuning. It’s a winning formula that delivers both outstanding fuel economy and smooth, responsive acceleration. With Yamaha’s Oil Injection System you don’t have to mess with premixing the gasoline and oil. The system constantly monitors engine load to inject the right amount of oil. On the larger displacement models our Microcomputer Ignition System is standard equipment so you can rest assured the engine is always running finely tuned and with optimum fuel efficiency.

 

Features

3-Cylinder Engine & Loop Charging - High performance & fuel economy, Thermostatic Cooling Control - reliability, Maintenance Free CDI - high performance, Reliability & sure start, steering Friction Adjustment Hydro-Tilt with Shallow Water Drive & Oil Injection - convenience, Wide Range Power Trim & Tilt (PTT) - convenience & high performance, Prime Start - sure start, Long-span Mounting System & Labyrinth Exhaust System - Low vibration, Low noise, Start-In-Gear Prevention - convenience, Over-Rev Limiter & Overheat Warning - reliability, Special Aluminium Alloy (YDC-30), 5-stage Multiple Coating, Self-Sacrificing Anodes - anti-corrosion

Specifications

  • Engine Type In-line 3
  • Displacement 698cm³
  • Bore x Stroke 67.0 x 66.0mm
  • Compression ratio 6.1:1
  • Starting enrichment MHO, MHD: Manual choke WHTO, ET, ETO: Prime Start
  • Scavenging Loop Charge
  • Fuel induction system 3 Carburettors
  • Lubrication system ET: MHD: Pre-mixed fuel and oil MHO, WHTO, ETO: Oil injection
  • Oil-Fuel Mixing Ratio MHD: 50:1
  • Engine oil capacity MHO, WHTO, ETO: 1.5L
  • Ignition system CDI
  • Ignition timing ATDC 7.0 – BTDC 25.0 deg.
  • Spark plug B7HS-10, B8HS-10
  • Alternator ETO WHTO: 6A
  • Cooling system Raw-water, thermostatically controlled
  • Exhaust system Through Propeller Boss
  • Dry weight 75 – 93kg
 

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